Hypothesis Testing
States that there is no relationship between 2 variables.
What is Null Hypothesis?
The percent chance that our results are due to chance/sampling error.
What is significance/p-value?
The likelihood of detecting an effect if it exists.
What is power?
The three things needed to calculate a z-score for a sampling distribution:
What is the sample mean?
What is the population mean?
What is the standard error?
What a z-test does.
What is compare a sample mean and a population mean?
States that there is a relationship between 2 variables.
What is Alternative Hypothesis?
A false positive.
Rejecting the Null when we shouldn't.
What is Type 1 Error?
The probability of type 2 error.
What is beta?
A measure of how many standard deviations a raw score is away from the mean.
What is a z-score?
What we must do to the alpha for a two-tailed z-test.
What is divide by 2?
The critical value marks the ________
What is the significance cutoff?
A statistically significant result reported in the wrong direction.
What is Type 3 Error?
The cutoff for power.
What is .2?
The three things required to calculate a z-score:
What is a raw score?
What is the mean of the dataset?
What is the standard deviation of the dataset?
The four things required for a z-test:
What is a sample mean?
What is a population mean?
What is the population SD?
What is the sample size?
What is list hypotheses?
What is identify critical values?
What is calculate the test statistic?
What is report results?
The probability of a type 1 error.
What is alpha?
The closer power is to _____, the more likely an analysis is to return significant results if they exist.
What is 1?
The mean of a sampling distribution.
What is the true population mean?
Results are considered statistically significant when:
The z-obtained exceeds the z-critical.
The area a score must fall to be statistically significant.
What is the region of rejection?
A false negative.
Failing to reject the Null when we should reject it.
What is Type 2 Error?
__________ is more likely to obtain a Null result, even if a significant result exists.
What is an underpowered analysis?
An infinite number of sample means plotted on a normal curve.
What is sampling distribution of the mean?
The four assumptions of a z-test:
What is a continuous dependent variable?
What is normality?
What is randomness?
What is known population parameters?